title: Systemic contact dermatitis to raw cashew nuts in a pesto sauce.
abstract: Systemic contact dermatitis from the cashew nut shell oil resorcinol allergens cardol and anacardic acid is recognized clinically as a dermatitis with flexural accentuation, typically distributed on the extremities, groin, and buttocks, and occurring generally 1 to 3 days after ingestion of raw cashew nuts contaminated with allergenic oil. We report a case of systemic contact dermatitis to raw cashew nuts, an atypical and unexpected ingredient flavoring an imported pesto sauce. Plants with allergens that potentially cross-react with poison ivy and other Toxicodendrons, and the concepts of systemic contact dermatitis and hyposensitization are reviewed.
authors.affiliation: Section of Dermatology, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA.
authors.forename: T K
authors.initials: TK
authors.lastname: Hamilton
authors.forename: K A
authors.initials: KA
authors.lastname: Zug
mesh_terms: D000485:Allergens; D017449:Dermatitis, Allergic Contact / Q000209:etiology / Q000473:pathology*; D005512:Food Hypersensitivity / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009754:Nuts / Q000009:adverse effects*
chemical_list: D000485:Allergens